class Settings():
	"""存储《外星人入侵》的所有设置的类"""
	def __init__(self):
		"""初始化游戏的静态设置"""
		# 屏幕设置
		self.screen_width = 1200
		self.screen_heigh = 800
		self.bg_color = (230,230,230)

		# 飞船的设置
		# 控制飞船的运行速度
		self.ship_limit = 3

		# 子弹设置,子弹速度，子弹宽度，子弹高度，允许的子弹数
		self.bullet_width = 3
		self.bullet_height = 15
		self.bullet_color = (60,60,60)
		self.bullets_allowed = 3

		# 外星人设置
		self.fleet_drop_speed = 10

		# 以什么样的速度加快游戏节奏
		self.speedup_scale = 1.1

		# 外星人点数的提高速度
		self.score_scale = 1.5

		self.initialize_dynamic_settings()

	def initialize_dynamic_settings(self):
		"""初始化随游戏进行而变化的设置"""
		self.ship_speed_factor = 1.5
		self.bullet_speed_factor = 2
		self.alien_speed_factor = 1

		# fleet_direction为1表示向右移，为-1表示向左移
		self.fleet_direction = 1

		# 计分
		self.alien_points = 50

	def increase_speed(self):
		"""提高速度设置和外星人点数"""
		self.ship_speed_factor *= self.speedup_scale
		self.bullet_speed_factor *= self.speedup_scale
		self.alien_speed_factor *= self.speedup_scale
		self.alien_points = int(self.alien_points * self.score_scale)
		# print(self.alien_points)